Emanuel keller



(No Model.)

B. & O. KELLER 8: G. ELBAUHAHNJ PIANO DAMPER.

No. 848,676. Patented Sept. 1886.

in mm 61.

ATTORNEY Nv PETERS. Phnmiilhographen Wnhingion, D. c.

UNITED STATES PATENT OFFICE.

EMANUEL KELLER, GONSTANTINE KELLER, AND GUSTAV E. BAUHAHN, OF NEW YORK,N. Y.

PIANO-DAMPER.

SPECIFICATION forming part of Letters Patent No: 348,676, datedSeptember '7, 1886.

Application filed August i l, 1885.

To aZZ whom it may concern.-

Be it known that we, EMANUEL KELLER, CONSIANTINE KELLER, and GUSTAV E.BAU- HAHN, citizens of the United States,residing at New York, in thecounty of New York and State of New York, haveinvented certain new anduseful Improvements in Piano-Actions, of which the following is aspecification, reference being had therein to the accompanying IOdrawing.

Our invention relates to the arrangement oftwo or more dampers inconnection with de vices for operating the same, as hereinafter fullydescribed.

The accompanying drawing represents an elevation ofmy invention asapplied to an upright piano.

The hammer A and the primary damper B and their connections are of theusual construclion, and their arrangement is the same as that which isusually employed in upright pianos.

To the rod G, which carries the damper B, is attached by a block, I),and a screw, d, one end of a wire rod, E, which extends horizontallytoward the left-hand side of the figure,

thence upward, and thence horizontally toward the right-hand side of thefigure toapoint near lhe piano string G, where it is bent upe ward andhas attached to it by a block, H,

and screw f the secondary or auxiliary damper J.

By the arrangement here shown the two dampers B and J are above andbelow the point where the hammer A strikes the strings G, both dampersbeing carried practically by one and the same supportand being on oneand the same side of the pianostring, the hammer striking the stringmidwaybetween the dampers. By this arrangementthe vibration of thestring is arrested and the sound is deadened more ellectually than whereonly one damper is used.

At a suitable point in the upper horizontal Serial No. l7-i,-150.(Nomodch) portion of the wire rod E, between the upright 5 portion andthe end which carries the secondary damper, the rod E is flattenedvertically, and to this flattened portion is pivoted the lower end of aswinging bar or rod, M, the upper end of which is pivoted to an arm, L,car- 5o ried by a bar, a, which extends the entire length of theaction-frarne.

To the arm L is attached one end of a curved spring, S, the otherofwhich bears againstthe rod M above the pivot. This spring tends to keepthe upper damper, J, against the string G by its action on the wire E,through thebar M, and thus insure more effectually the deadening of thesound by arresting the vibrations of the string, while the pivotedcondition of 6 the bar M permits it, together with the spring S, toaccommodate itself to the withdrawal of said damper.

\Ve are aware that two dampers to each hammer are old in piano-actions,and we do 6 not claim such, broadly, as our invention.

XVhat we claim as new, and desire to secure by Letters Patent, is

1. In a piano-action, the combination, with a secondary or auxiliarydamper, of rod E, the swinging bar M, acting on said rod, and spring S,acting on said bar M, substantially as and for the purpose hereindescribed.

2. The combination, with hammer A and primary damper 13, of theauxiliary damper J, the bent rod E, connecting said auxiliary damper tothe primary damper, the swinging bar M, connected to said rod to actthereon, and the spring S, acting on said bar, substantially as and forthe purpose described.

In testimony whereof we allix our signatures in presence of twowitnesses.

EMANUEL KELLER. GONSTANTINE KELLER. GUSTAV E. BAUHAHN.

\Vitnesses:

Framers C. BOWEN, JAS. S. EW'BANK.

